So, i have -06 1.6 TDCi and the problem is it makes pretty nasty knocking sound after 2700rpm. I changed oils and it got _ a lot_ better, but after i washed my engine today, it got back to worse again.

pre 2700rpm it runs like a baby, but after that its knocking, acceleratin or decelerating (so i dont think its "diesel knock")...

what could it be? hydraulic tappets? is there what kind of cam chain tensioner or?

Predetonation? If it is. that is very bad to allow.. Timing.. something is wrong with the timing advance? so after 2700 it goes haywire.
I would look at whatever controls the ignition timing as being off..

Just did some more testing on the parking lot. If you slowly raise the revs, it doesent knock untill 3k rpm, but if you stomp it from the idle, and release the gas somewhere around ~2.5k, it makes the knock on throtle release. You can only hear it for a brief moment but its there.

So over 3k and when you stomp it like they do in inspection, it knocks... So, this is injectors or ?

Well well, after pocking hang-overed brother whit a stick (he's manager on automotive shop that i use as a garage) i got to the garage planing on doing the leak-off test.

I washed the enginebay on wednesday, and havent realy looked under the bonnet after that. Well, gotted the car in, popped the hood and took an eye on the injectors... No need for leak off test. Injectors 1 & 3 were wet from the root, and injectors 2 & 4 were dry ( pics: http://imgur.com/a/32CIS - the numbering starts from the cam belt side).

So, skipped the leak-off test and were planning to check the turbos oil-pipe mesh... but in order to get our hands on it, it seems like you need to take the turbo and exhaust manifold of. But, the on the upper end of the feeder pipe, all looked good. There was oil, and it looked pretty much same as on the dipstick. Also checked the mesh on the vacuum pump, and it was clean.

So, i guess next step is to get the seal kit from the dealer, and mondeospares sayd theyll be in contact if they can get theyr hands on for a propper set of 1.6tdci injectors.

That leaves me for coding? What would be the ideal way? buy my own ForDiag, FSuper, FO-COM or change the injectors, hope it starts and drive it to dealer?

EDIT: Forgot, as you can see, someone has allready done something to the injectors since they are all numbered... Would be nice to know what it might been. The car has full Ford service record, but there is no mention on the book that theyve mendled whit the injectors (but there is notes like "wheel bearings changed etc etc)

EDIT2:

Or what do you think? Should i just buy the seal kit, and clean the injectors, witch saves me from recoding them (i got industrial ultrasonic cleaner at work that i could use to clean em) or buy new used set?

Friend loaned me a commonral leakoff test kit, so im planning to do a leakoff test today, in order to determine if i should just change the seals, or change the injectors while im at it.

Anyone has any info what the leakoff should be, in example 300sec intervall? I found leakoff test for mondeo (30sec idle, 30sec 2,5k rpm, 30sec idle, etc etc) that should give 25ml whit propper injectors... Anything like that for focus ?

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